TSPY_DYRE.JSV
PWS:Win32/Dyzap.F (Microsoft), Infostealer.Dyranges (Symantec)
Windows
Threat Type: Spyware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It deletes itself after execution.
TECHNICAL DETAILS
Arrival Details
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This spyware drops the following copies of itself into the affected system:
- %Windows%\{random filename}.exe (for Windows XP and below)
- %AppDataLocal%\{random filenam}.exe (for Windows Vista and above)
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
Autostart Technique
This spyware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\ControlSet001\Services\
googleupdate
ImagePath = "%Windows%\{random filename}.exe" (for Windows XP and below)
HKEY_LOCAL_MACHINE\ControlSet001\Services\
googleupdate
DisplayName = "Google Update Service" (for Windows XP and below)
HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
(Default) = "%AppDataLocal%\{random filenam}.exe" (for Windows Vista and above)
Other Details
This spyware connects to the following possibly malicious URL:
- http://{BLOCKED}1.voiceeclipse.net
- http://{BLOCKED}n.ipshka.com
It drops the following file(s)/component(s):
- %System%\config\systemprofile\Application Data\{random filename}.dat (for Windows XP and below)
- %AppDataLocal%\{random filename}.dat (for Windows Vista and above)
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
It deletes itself after execution.